def test_percent(self):
"""
Percentage should behave properly for ProgressHelper
"""
progress = ProgressHelper()
output = self.get_output_stream()
progress.start(output, 50)
progress.display()
progress.advance()
progress.advance()
output.get_stream().seek(0)
self.assertEqual(self.generate_output(' 0/50 [>---------------------------] 0%')
+ self.generate_output(' 1/50 [>---------------------------] 2%')
+ self.generate_output(' 2/50 [=>--------------------------] 4%'),
output.get_stream().read())
